Shock absorber



Aug. 2l, 1928.

1,681,205 T. H. WILLIAMS SHOCK ABSORBER Filed Oct.. 4, 1926 2 Sheets-Sheet 1 Aug. 21, 1928. 1,681,205

T. H. WILLIAMS SHOCK ABSORBER Filed 0G13. 4, 1926 2 Sheets-Sheet 2 5 l A x JQ l 75 J6 74 ..79 l l- 6 of the link the other half. For this reason the pivot need not be excessively large and is not subject to excessive wear.

In the operation of the shock absorber the lever G is swung in proportion to the extent of' relative movement ot the axle 2 away from normal position in either direction, the direction in which the axle 2 is traveling governing the direction in which the lever G will be pivoted. As the lever G is swung in accordance with the relative movement of the axlek the band 13 will oscillate with said lever. It will be noted that the carriage 14- aii'ords a contractable `connection Jfor one end of the band 13 sovtliat as the lever G is swung about the fulcrum 5 in either direction the roller 1S as 'it travels away from the center of the groove 19 in either direction will pivot the carriage 14 ina clockwise direction, thus increasing the tension ol the band about the drum and rctarding the movement of the axle 2. The roller 18, when the axle 2 is in normal position, is near the center of thegroovc 19 so that any appreciable abnormal movement between the axle 2 and chassis 1 will canse the carriage 1d to he pivoted in a clockwise direction. 1t will be noted, however, that as the roller .18 travels for a short space on either side of the center of the groove 19 there will be no appreciable pivotal movement transmitted to the carriage 14 so that there is practically no increase in retarding elfect except when abnormal relative movements between the running gear and chassis take place. rlhe normal position of the roller 18 yis a little below the center of the groove 19 so that the increase in retarding eil'ect will take place more readily when the axle 2 is moving downwardly relative to the chassis 1 than when said axle is moving upwardly relative to said chassis because it is desirable to check the abnormal movements of the running gear` more quickly below normal position than above, as for instance, when the wheels of the vehicle drop in a hole.

It will be observed that the aforedescribed shock absorber is very rugged and adapted to withstand the exigencies of the service demanded ol it, that the contractable connection between the lower end of the band 13 and the lever G will operate to increase the friction between said band and the drum 3 in proportion to the extent of abnormal relative movement between the running gear and the chassis, and that the roller 18 being normally in a position a little below the center of the groove 19 the increase in retarding effect will take place more quickly when the running gear moves downwardly from its normal position than when it moves upwardly relative to the chassis.

I am aware that many changes may be made and many details of construction varied without departing'trom the principles of this invention, and I do not wish to be limited to the details shown and described.

I claim:

l. A shock absorber adapted to retard the relative movement between two parts of a vehicle, comprising a curved friction member on one oi said parts, a band engaged by said member, means connected to the other part for rotating said band in accordance with such movement, said friction member having cam means associated therewith, and means operable upon the rotation of said band and controlled by said cam means for increasing the friction between said member and band in accordance with the rotational movement thereof in either direction.

2. A shock absorber adapted to retard the relative movement between two parts of a vehicle, comprising a curved friction member on one of said parts, a band engaged over said member, and means connected to the other part for rotating said band in accordance with ,such movement, said band having a rectractable connection between one end thereof and said means for varying its tension about said friction member, the latter having a cam'formed on its outer periphery for controlling said connection in accordance with the rotational movement of said band.

3. A shock absorber adapted to retard the relative movement between two parts of a vehicle, comprising a curved friction meinber on one of said parts, a band engaged over said member, means connected to the other part for rotating said band in accordance with such movement, and cam means associated with said member, one end of said band being secured to said first means through means of a link, said end joining said lilik intermediate the ends thereof, said link being pivoted at one end to said first means and having its other end in engagenient with said cam, the latter being adapted to pivot said link in accordance with the relative movement of said parts.

4. A shock absorber adapted to retard the relative movement between two parts of a vehicle, comprising a curved friction me1nber on one of said parts, a band engaged over said member, and means connected to the other part for rotating said band in accordance with such movement, said band having a retractable connection to one end thereof for varying the tension thereof about said friction member, the latter havingy a fiat portion formed on its outer pe riphery for controlling said connection in accordance with the rotational movement of said band.

5. A shock absorber adapted to retard the relative movement between two parts ot a vehicle. comprising a curved friction mem ber on'one ot' said parts, a band engaged over said member, and means connected to IUU lll

the other part for rotatingsa-id bandi in faccordancefwith such movement, said band having one end thereof connected' to said rst -means throughjalink, said end being secured to said link `intermediate :the ends thereof, said `li`nk"beingpivoted at` one end to saidmeans, said friction member having a portion, the' other endof said 'link being in engagement with `said portion and adapted to bepivotedthereby in accordance Withthe rotationalimovementof said band.

6( A shock absorber ladapted to retard the relative inoveinent'betwen two parts of a vehicle, comprising a curved friction .inember on one of saidfparts, aband engaged over said member, andmeansl connected to the other part forrotatingsaid'band in accordance with such movement, said handhaving a contractableconnection toone end thereof i for `varying the tensionthereof about said friction member.. the latter having `a `flat portion thereon -`fo`r controlling. said `connec tion inaccordance'rwith*the rotational move- (illinent of said band, theA contractable connecvtion being normally in `engagement with said fiat portion at a position alittle to one side of the `center thereof when the said parts are in normal position whereby said connection lwill act to increase Athe tension ont saidnband when said parts move in either direction romnormal position and will take effect morev quickly `wlien'tljie said. parts are moving in one,` direction from normal than when theyare moving in the otherdirection *from normal.'` f y i 7. A shock absorber adapted to, retard the relative movement between two .parts otra vehicle, comprising la v.curved friction mem-.

ber on one of said parts, a band engaged over said member-,and means connected to the other 4part for rotating'said band in accordance with such movement, said band having'- one end thereof connected to said means through meansoflalink and being secured tosaid link 4intermediate the ends thereof, said link being pivoted at one end `to said means, said member having -a fiat portion, the other endof said link being in'.

Vengagement with said lat portion for pivot ing said link in accordance with'the rota tional movement of said band, said link bee ing normally in engagement withsaid tlat portion at a position appreciably to one side ,of the center thereof whenV the said parts are in normal position.

8. A shock absorbei'adapted to retard the relative movement between two parts of a vehicle, comprising a curved friction memberon one ofsaid parts, a band engaged byl said member, a lever pivoted adjacent said friction `memloer'h'aving oneA end linked to the other of saidy parts for. rotating said i band in accordancewith such movement and `the other end extending adjacent the Vperiphery of the curved member to'act as a lguide `for preventing said band from work-A ing off ,saidmembeig `and means for increase,

ing the friction between saidmember. and4 band "in accordance' with the. rotatio1i`al= .movement thereof.

9. "A- shock absorber adapted to retaidthe relative movement between two parts of a:

vehicle, comprising acurved `friction menu" bei' on one of said parts, a band vengagedby said member, means connected to the other 'part for rotating said band ingaccoidance witlisuoh movement, said member having a flat portion thereon,fand `means opciable upon the rotation of said band and 'controlled by saidilat portion for increasing the friction vbetween, said inember' and band' when vsaid parts move in Veither direction away rfrom normal position.

.Y 10. A shock absorber adapted,` to retard@ the relative movement between two parts of g a vehicle, coiiprising a substantially round friction member on oneofsaid parts,` a band 'surrounding said member, meansfconnected tol the other part iorgrotating said bandV in accordance with such `movement, said` member having a flat portion thereon, and

means normally engaging said flat portion and operable upon the rotation of said band "for increasing the frictioiibetween said member and band kwhen said' parts move in* any direction away` from noi'iiial position,

sie.Y

saidlast n'ieansbeing adapted to ride away i'iointhe center ol' said flat portion-whensaid niovcmentis abnormal and 'to approach j the center of said portion when said move# `nient approaches normal. l g i 11. A shock absorber adapted to retard the relative movement between two parts otj a vehicle, comprising a curved lfriction member on one of said parts, a band en# gaged over said member, vmeans connectedV to the other part for rotating vsaid bandin accordance with such inovement, and cam means associated with said member, one end of said band being secured to said first jineans by a link, said end joining said link intermediate the Vends thereof, said link being pivoted at 'one end to said `first means other partf for rotating said band in ac-` cordance with such movement, said band` havinga retractable connectionV at one end thereof` for. varying itsV tension about said friction `member, the latter having `cam means associated therewith for controlling said connection infaccordanceA with the roiio' tational movement of said band, said connection including a roller provided with an anti-friction bearingT adapted to be engaged by said cam for effecting such control.

13. A shock absorber adapted to retard the relative movement between two parts oi a vehicle. comprising a cin-ved friction member on one ot' said parts. a band engaged over said member, and means eonnected to the other part Yfor rotatingr said band in accordance with such movement, said band havingr a retractable connection between one end thereof and said means for varyingr its tension about said friction member, the latter havingIl cam means associated therewith 'for controlling Said connection in accordance with the` rotational movement of said band. said connection including a lever operable toY contract said connection and a roller provided with an anti-friction bearing mounted at one end ol' .said lever and adapted to be engaged hv said cam means 'for effecting sneh control, said roller forming the outer race for the bearing and having an inner race rig-M13v secured to said lever.

14. A shock absorber adapted to retard the relative movement between two parts ol a vehicle. comprising;r a curved friction member on one of said parts. a band cngaged over said member. means comiected to the other part for rotatingr said band in accordance with snch movement, a cam .sociated with said-member, and a link connecting one end of said band with said means. said link bein; pivotally connected to said means. the pivot therefor being' without the periphery of said friction member. the cam being adapted to pivot said link in accordance with the relative movements of said parts `for increasing the tension on said band in accordance with said relative movement.

l5. A shock absorber adapted to retard the relative movement between two parts ot a vehicle, comprising an annular friction member on one of said paris. the periphery ol said member beingr continuous, a band engaged over said member, and means connected to the other part for rotating said hand in accordance with sach movement. said band having a contractable connection between one end thereof and laaid means for varyingr its tension about said friction member. the latter having a cam associated therewith l'or controllingr said connection in accordance with the rotational movei'i'lent of said band. y

1V. A shock absorber adapted to retard the relative movement between two parts of a vehicle, comprising;l a curved friction niember on one ot' lsaid parte, a band engaged over said member, means connected to the vother part, for rotatingr said band in accordance with such movement. and Cain means asfsmgated with said member. said rotating means including a roekable link joining one end o'l said band intermediate the ends ot' the link. one end of the link being coimected to said means` and the other end adapted to engage said cam whereby a torce exerted on said band by said roekable link will be equivalent to the combined forces actin;T on the ends of .said link.

ln witness of the foregoing I aflix my signature.

THER ON Il. WILLl AMS.

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